Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20250217-en - resource tags
- submitted
25/02/2025, 22:56
General
- Target 43e23ddaf45012061ea60e5aa62c9e70d9028ae13c477f5ae17cf7be7fb05384.exe
- Size 253KB
- Sample250225-2w4vkasms3
- SHA256 43e23ddaf45012061ea60e5aa62c9e70d9028ae13c477f5ae17cf7be7fb05384
Malware Config
Extracted
-
darkcomet
-
Guest16
-
91.157.132.221:5555
-
DC_MUTEX-AF28X5E
-
InstallPath
MSDCSC\msdcsc.exe
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gencode
bCj76JyxRToA
-
install
true
-
offline_keylogger
true
-
persistence
false
-
reg_key
RSBot
Signatures
- Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
- Darkcomet family
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
- Windows security bypass 2 TTPs 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Windows security modification 2 TTPs 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- UPX packed file 9 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 48 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\43e23ddaf45012061ea60e5aa62c9e70d9028ae13c477f5ae17cf7be7fb05384.exe"C:\Users\Admin\AppData\Local\Temp\43e23ddaf45012061ea60e5aa62c9e70d9028ae13c477f5ae17cf7be7fb05384.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe"C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe"2⤵
- Windows security bypass
- Executes dropped EXE
- Windows security modification
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Replay Monitor
Loading Replay Monitor...
Downloads
msdcsc.exe
memory/3868-0-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/3868-1-0x00000000009D0000-0x00000000009D1000-memory.dmp
memory/3868-16-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/3928-14-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/3928-15-0x0000000000780000-0x0000000000781000-memory.dmp
memory/3928-17-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/3928-20-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/3928-22-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/3928-24-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/3928-26-0x0000000000400000-0x00000000004BA000-memory.dmp